3、或fe结尾的词去f或fe改ves如:knife——knives,half——halves。以o结尾的无生命的词加s如:zoo——zoos,photo——photos。以o结尾的有生命的词加es如:tomato——tomatoes。不规则变化:改变单数名词中的元音字母如:man——men,woman——women。单复数的形式相同如:sheep——sheep,Chinese——Chinese。其他形式如:mouse——mice,child——children。(1)将下列名词改为复数形式。1. teacher __________2. class _
4、_________3. name ____________4. orange_________ 5. number ___________ 6. apple___________7. bus_________ ___8. eraser___________ 9.photo___________10.tomato___________ 11.country_________12.friend_________13.knife_____________14.foot___________15.boy_______________ 16.
5、mouse__________17.toy___________18.factory___________ 19.family_________ 20.wish_____________(2)选择正确的一项填到横线上。22. There is some _______ on the plate. A. cakes B. meat C. potato D. pears 23. The______ has two _______. A. boys; watches
6、 B. boy; watch C. boy; watches D. boys; watch 24. The little baby has two _______ already. A. tooth B. tooths C. teeth D. teeths二、名词所有格。名词所有格表示“某人的”名词所有格的表示:一般情况下,不以s结尾的名词加’s如:Mike’s,girl’s,mother’s。以s结尾的复数名词加’如:students’,parent